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Merge remote-tracking branch 'asoc/fix/cs4271' into asoc-linus
[mirror_ubuntu-eoan-kernel.git] / drivers / gpu / drm / exynos / exynos_drm_fimd.c
1 /* exynos_drm_fimd.c
2 *
3 * Copyright (C) 2011 Samsung Electronics Co.Ltd
4 * Authors:
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Inki Dae <inki.dae@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14 #include <drm/drmP.h>
15
16 #include <linux/kernel.h>
17 #include <linux/platform_device.h>
18 #include <linux/clk.h>
19 #include <linux/of.h>
20 #include <linux/of_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/component.h>
23 #include <linux/mfd/syscon.h>
24 #include <linux/regmap.h>
25
26 #include <video/of_display_timing.h>
27 #include <video/of_videomode.h>
28 #include <video/samsung_fimd.h>
29 #include <drm/exynos_drm.h>
30
31 #include "exynos_drm_drv.h"
32 #include "exynos_drm_fb.h"
33 #include "exynos_drm_crtc.h"
34 #include "exynos_drm_plane.h"
35 #include "exynos_drm_iommu.h"
36
37 /*
38 * FIMD stands for Fully Interactive Mobile Display and
39 * as a display controller, it transfers contents drawn on memory
40 * to a LCD Panel through Display Interfaces such as RGB or
41 * CPU Interface.
42 */
43
44 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
45
46 /* position control register for hardware window 0, 2 ~ 4.*/
47 #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16)
48 #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16)
49 /*
50 * size control register for hardware windows 0 and alpha control register
51 * for hardware windows 1 ~ 4
52 */
53 #define VIDOSD_C(win) (VIDOSD_BASE + 0x08 + (win) * 16)
54 /* size control register for hardware windows 1 ~ 2. */
55 #define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16)
56
57 #define VIDWnALPHA0(win) (VIDW_ALPHA + 0x00 + (win) * 8)
58 #define VIDWnALPHA1(win) (VIDW_ALPHA + 0x04 + (win) * 8)
59
60 #define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8)
61 #define VIDWx_BUF_START_S(win, buf) (VIDW_BUF_START_S(buf) + (win) * 8)
62 #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8)
63 #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4)
64
65 /* color key control register for hardware window 1 ~ 4. */
66 #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + ((x - 1) * 8))
67 /* color key value register for hardware window 1 ~ 4. */
68 #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + ((x - 1) * 8))
69
70 /* I80 trigger control register */
71 #define TRIGCON 0x1A4
72 #define TRGMODE_ENABLE (1 << 0)
73 #define SWTRGCMD_ENABLE (1 << 1)
74 /* Exynos3250, 3472, 5260 5410, 5420 and 5422 only supported. */
75 #define HWTRGEN_ENABLE (1 << 3)
76 #define HWTRGMASK_ENABLE (1 << 4)
77 /* Exynos3250, 3472, 5260, 5420 and 5422 only supported. */
78 #define HWTRIGEN_PER_ENABLE (1 << 31)
79
80 /* display mode change control register except exynos4 */
81 #define VIDOUT_CON 0x000
82 #define VIDOUT_CON_F_I80_LDI0 (0x2 << 8)
83
84 /* I80 interface control for main LDI register */
85 #define I80IFCONFAx(x) (0x1B0 + (x) * 4)
86 #define I80IFCONFBx(x) (0x1B8 + (x) * 4)
87 #define LCD_CS_SETUP(x) ((x) << 16)
88 #define LCD_WR_SETUP(x) ((x) << 12)
89 #define LCD_WR_ACTIVE(x) ((x) << 8)
90 #define LCD_WR_HOLD(x) ((x) << 4)
91 #define I80IFEN_ENABLE (1 << 0)
92
93 /* FIMD has totally five hardware windows. */
94 #define WINDOWS_NR 5
95
96 /* HW trigger flag on i80 panel. */
97 #define I80_HW_TRG (1 << 1)
98
99 struct fimd_driver_data {
100 unsigned int timing_base;
101 unsigned int lcdblk_offset;
102 unsigned int lcdblk_vt_shift;
103 unsigned int lcdblk_bypass_shift;
104 unsigned int lcdblk_mic_bypass_shift;
105 unsigned int trg_type;
106
107 unsigned int has_shadowcon:1;
108 unsigned int has_clksel:1;
109 unsigned int has_limited_fmt:1;
110 unsigned int has_vidoutcon:1;
111 unsigned int has_vtsel:1;
112 unsigned int has_mic_bypass:1;
113 unsigned int has_dp_clk:1;
114 unsigned int has_hw_trigger:1;
115 unsigned int has_trigger_per_te:1;
116 };
117
118 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
119 .timing_base = 0x0,
120 .has_clksel = 1,
121 .has_limited_fmt = 1,
122 };
123
124 static struct fimd_driver_data exynos3_fimd_driver_data = {
125 .timing_base = 0x20000,
126 .lcdblk_offset = 0x210,
127 .lcdblk_bypass_shift = 1,
128 .has_shadowcon = 1,
129 .has_vidoutcon = 1,
130 };
131
132 static struct fimd_driver_data exynos4_fimd_driver_data = {
133 .timing_base = 0x0,
134 .lcdblk_offset = 0x210,
135 .lcdblk_vt_shift = 10,
136 .lcdblk_bypass_shift = 1,
137 .has_shadowcon = 1,
138 .has_vtsel = 1,
139 };
140
141 static struct fimd_driver_data exynos5_fimd_driver_data = {
142 .timing_base = 0x20000,
143 .lcdblk_offset = 0x214,
144 .lcdblk_vt_shift = 24,
145 .lcdblk_bypass_shift = 15,
146 .has_shadowcon = 1,
147 .has_vidoutcon = 1,
148 .has_vtsel = 1,
149 .has_dp_clk = 1,
150 };
151
152 static struct fimd_driver_data exynos5420_fimd_driver_data = {
153 .timing_base = 0x20000,
154 .lcdblk_offset = 0x214,
155 .lcdblk_vt_shift = 24,
156 .lcdblk_bypass_shift = 15,
157 .lcdblk_mic_bypass_shift = 11,
158 .has_shadowcon = 1,
159 .has_vidoutcon = 1,
160 .has_vtsel = 1,
161 .has_mic_bypass = 1,
162 .has_dp_clk = 1,
163 };
164
165 struct fimd_context {
166 struct device *dev;
167 struct drm_device *drm_dev;
168 struct exynos_drm_crtc *crtc;
169 struct exynos_drm_plane planes[WINDOWS_NR];
170 struct exynos_drm_plane_config configs[WINDOWS_NR];
171 struct clk *bus_clk;
172 struct clk *lcd_clk;
173 void __iomem *regs;
174 struct regmap *sysreg;
175 unsigned long irq_flags;
176 u32 vidcon0;
177 u32 vidcon1;
178 u32 vidout_con;
179 u32 i80ifcon;
180 bool i80_if;
181 bool suspended;
182 int pipe;
183 wait_queue_head_t wait_vsync_queue;
184 atomic_t wait_vsync_event;
185 atomic_t win_updated;
186 atomic_t triggering;
187 u32 clkdiv;
188
189 const struct fimd_driver_data *driver_data;
190 struct drm_encoder *encoder;
191 struct exynos_drm_clk dp_clk;
192 };
193
194 static const struct of_device_id fimd_driver_dt_match[] = {
195 { .compatible = "samsung,s3c6400-fimd",
196 .data = &s3c64xx_fimd_driver_data },
197 { .compatible = "samsung,exynos3250-fimd",
198 .data = &exynos3_fimd_driver_data },
199 { .compatible = "samsung,exynos4210-fimd",
200 .data = &exynos4_fimd_driver_data },
201 { .compatible = "samsung,exynos5250-fimd",
202 .data = &exynos5_fimd_driver_data },
203 { .compatible = "samsung,exynos5420-fimd",
204 .data = &exynos5420_fimd_driver_data },
205 {},
206 };
207 MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
208
209 static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
210 DRM_PLANE_TYPE_PRIMARY,
211 DRM_PLANE_TYPE_OVERLAY,
212 DRM_PLANE_TYPE_OVERLAY,
213 DRM_PLANE_TYPE_OVERLAY,
214 DRM_PLANE_TYPE_CURSOR,
215 };
216
217 static const uint32_t fimd_formats[] = {
218 DRM_FORMAT_C8,
219 DRM_FORMAT_XRGB1555,
220 DRM_FORMAT_RGB565,
221 DRM_FORMAT_XRGB8888,
222 DRM_FORMAT_ARGB8888,
223 };
224
225 static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
226 {
227 struct fimd_context *ctx = crtc->ctx;
228 u32 val;
229
230 if (ctx->suspended)
231 return -EPERM;
232
233 if (!test_and_set_bit(0, &ctx->irq_flags)) {
234 val = readl(ctx->regs + VIDINTCON0);
235
236 val |= VIDINTCON0_INT_ENABLE;
237
238 if (ctx->i80_if) {
239 val |= VIDINTCON0_INT_I80IFDONE;
240 val |= VIDINTCON0_INT_SYSMAINCON;
241 val &= ~VIDINTCON0_INT_SYSSUBCON;
242 } else {
243 val |= VIDINTCON0_INT_FRAME;
244
245 val &= ~VIDINTCON0_FRAMESEL0_MASK;
246 val |= VIDINTCON0_FRAMESEL0_FRONTPORCH;
247 val &= ~VIDINTCON0_FRAMESEL1_MASK;
248 val |= VIDINTCON0_FRAMESEL1_NONE;
249 }
250
251 writel(val, ctx->regs + VIDINTCON0);
252 }
253
254 return 0;
255 }
256
257 static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
258 {
259 struct fimd_context *ctx = crtc->ctx;
260 u32 val;
261
262 if (ctx->suspended)
263 return;
264
265 if (test_and_clear_bit(0, &ctx->irq_flags)) {
266 val = readl(ctx->regs + VIDINTCON0);
267
268 val &= ~VIDINTCON0_INT_ENABLE;
269
270 if (ctx->i80_if) {
271 val &= ~VIDINTCON0_INT_I80IFDONE;
272 val &= ~VIDINTCON0_INT_SYSMAINCON;
273 val &= ~VIDINTCON0_INT_SYSSUBCON;
274 } else
275 val &= ~VIDINTCON0_INT_FRAME;
276
277 writel(val, ctx->regs + VIDINTCON0);
278 }
279 }
280
281 static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
282 {
283 struct fimd_context *ctx = crtc->ctx;
284
285 if (ctx->suspended)
286 return;
287
288 atomic_set(&ctx->wait_vsync_event, 1);
289
290 /*
291 * wait for FIMD to signal VSYNC interrupt or return after
292 * timeout which is set to 50ms (refresh rate of 20).
293 */
294 if (!wait_event_timeout(ctx->wait_vsync_queue,
295 !atomic_read(&ctx->wait_vsync_event),
296 HZ/20))
297 DRM_DEBUG_KMS("vblank wait timed out.\n");
298 }
299
300 static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
301 bool enable)
302 {
303 u32 val = readl(ctx->regs + WINCON(win));
304
305 if (enable)
306 val |= WINCONx_ENWIN;
307 else
308 val &= ~WINCONx_ENWIN;
309
310 writel(val, ctx->regs + WINCON(win));
311 }
312
313 static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
314 unsigned int win,
315 bool enable)
316 {
317 u32 val = readl(ctx->regs + SHADOWCON);
318
319 if (enable)
320 val |= SHADOWCON_CHx_ENABLE(win);
321 else
322 val &= ~SHADOWCON_CHx_ENABLE(win);
323
324 writel(val, ctx->regs + SHADOWCON);
325 }
326
327 static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
328 {
329 struct fimd_context *ctx = crtc->ctx;
330 unsigned int win, ch_enabled = 0;
331
332 DRM_DEBUG_KMS("%s\n", __FILE__);
333
334 /* Hardware is in unknown state, so ensure it gets enabled properly */
335 pm_runtime_get_sync(ctx->dev);
336
337 clk_prepare_enable(ctx->bus_clk);
338 clk_prepare_enable(ctx->lcd_clk);
339
340 /* Check if any channel is enabled. */
341 for (win = 0; win < WINDOWS_NR; win++) {
342 u32 val = readl(ctx->regs + WINCON(win));
343
344 if (val & WINCONx_ENWIN) {
345 fimd_enable_video_output(ctx, win, false);
346
347 if (ctx->driver_data->has_shadowcon)
348 fimd_enable_shadow_channel_path(ctx, win,
349 false);
350
351 ch_enabled = 1;
352 }
353 }
354
355 /* Wait for vsync, as disable channel takes effect at next vsync */
356 if (ch_enabled) {
357 int pipe = ctx->pipe;
358
359 /* ensure that vblank interrupt won't be reported to core */
360 ctx->suspended = false;
361 ctx->pipe = -1;
362
363 fimd_enable_vblank(ctx->crtc);
364 fimd_wait_for_vblank(ctx->crtc);
365 fimd_disable_vblank(ctx->crtc);
366
367 ctx->suspended = true;
368 ctx->pipe = pipe;
369 }
370
371 clk_disable_unprepare(ctx->lcd_clk);
372 clk_disable_unprepare(ctx->bus_clk);
373
374 pm_runtime_put(ctx->dev);
375 }
376
377
378 static int fimd_atomic_check(struct exynos_drm_crtc *crtc,
379 struct drm_crtc_state *state)
380 {
381 struct drm_display_mode *mode = &state->adjusted_mode;
382 struct fimd_context *ctx = crtc->ctx;
383 unsigned long ideal_clk, lcd_rate;
384 u32 clkdiv;
385
386 if (mode->clock == 0) {
387 DRM_INFO("Mode has zero clock value.\n");
388 return -EINVAL;
389 }
390
391 ideal_clk = mode->clock * 1000;
392
393 if (ctx->i80_if) {
394 /*
395 * The frame done interrupt should be occurred prior to the
396 * next TE signal.
397 */
398 ideal_clk *= 2;
399 }
400
401 lcd_rate = clk_get_rate(ctx->lcd_clk);
402 if (2 * lcd_rate < ideal_clk) {
403 DRM_INFO("sclk_fimd clock too low(%lu) for requested pixel clock(%lu)\n",
404 lcd_rate, ideal_clk);
405 return -EINVAL;
406 }
407
408 /* Find the clock divider value that gets us closest to ideal_clk */
409 clkdiv = DIV_ROUND_CLOSEST(lcd_rate, ideal_clk);
410 if (clkdiv >= 0x200) {
411 DRM_INFO("requested pixel clock(%lu) too low\n", ideal_clk);
412 return -EINVAL;
413 }
414
415 ctx->clkdiv = (clkdiv < 0x100) ? clkdiv : 0xff;
416
417 return 0;
418 }
419
420 static void fimd_setup_trigger(struct fimd_context *ctx)
421 {
422 void __iomem *timing_base = ctx->regs + ctx->driver_data->timing_base;
423 u32 trg_type = ctx->driver_data->trg_type;
424 u32 val = readl(timing_base + TRIGCON);
425
426 val &= ~(TRGMODE_ENABLE);
427
428 if (trg_type == I80_HW_TRG) {
429 if (ctx->driver_data->has_hw_trigger)
430 val |= HWTRGEN_ENABLE | HWTRGMASK_ENABLE;
431 if (ctx->driver_data->has_trigger_per_te)
432 val |= HWTRIGEN_PER_ENABLE;
433 } else {
434 val |= TRGMODE_ENABLE;
435 }
436
437 writel(val, timing_base + TRIGCON);
438 }
439
440 static void fimd_commit(struct exynos_drm_crtc *crtc)
441 {
442 struct fimd_context *ctx = crtc->ctx;
443 struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
444 const struct fimd_driver_data *driver_data = ctx->driver_data;
445 void *timing_base = ctx->regs + driver_data->timing_base;
446 u32 val;
447
448 if (ctx->suspended)
449 return;
450
451 /* nothing to do if we haven't set the mode yet */
452 if (mode->htotal == 0 || mode->vtotal == 0)
453 return;
454
455 if (ctx->i80_if) {
456 val = ctx->i80ifcon | I80IFEN_ENABLE;
457 writel(val, timing_base + I80IFCONFAx(0));
458
459 /* disable auto frame rate */
460 writel(0, timing_base + I80IFCONFBx(0));
461
462 /* set video type selection to I80 interface */
463 if (driver_data->has_vtsel && ctx->sysreg &&
464 regmap_update_bits(ctx->sysreg,
465 driver_data->lcdblk_offset,
466 0x3 << driver_data->lcdblk_vt_shift,
467 0x1 << driver_data->lcdblk_vt_shift)) {
468 DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
469 return;
470 }
471 } else {
472 int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
473 u32 vidcon1;
474
475 /* setup polarity values */
476 vidcon1 = ctx->vidcon1;
477 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
478 vidcon1 |= VIDCON1_INV_VSYNC;
479 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
480 vidcon1 |= VIDCON1_INV_HSYNC;
481 writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
482
483 /* setup vertical timing values. */
484 vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
485 vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
486 vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
487
488 val = VIDTCON0_VBPD(vbpd - 1) |
489 VIDTCON0_VFPD(vfpd - 1) |
490 VIDTCON0_VSPW(vsync_len - 1);
491 writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
492
493 /* setup horizontal timing values. */
494 hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
495 hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
496 hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
497
498 val = VIDTCON1_HBPD(hbpd - 1) |
499 VIDTCON1_HFPD(hfpd - 1) |
500 VIDTCON1_HSPW(hsync_len - 1);
501 writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
502 }
503
504 if (driver_data->has_vidoutcon)
505 writel(ctx->vidout_con, timing_base + VIDOUT_CON);
506
507 /* set bypass selection */
508 if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
509 driver_data->lcdblk_offset,
510 0x1 << driver_data->lcdblk_bypass_shift,
511 0x1 << driver_data->lcdblk_bypass_shift)) {
512 DRM_ERROR("Failed to update sysreg for bypass setting.\n");
513 return;
514 }
515
516 /* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
517 * bit should be cleared.
518 */
519 if (driver_data->has_mic_bypass && ctx->sysreg &&
520 regmap_update_bits(ctx->sysreg,
521 driver_data->lcdblk_offset,
522 0x1 << driver_data->lcdblk_mic_bypass_shift,
523 0x1 << driver_data->lcdblk_mic_bypass_shift)) {
524 DRM_ERROR("Failed to update sysreg for bypass mic.\n");
525 return;
526 }
527
528 /* setup horizontal and vertical display size. */
529 val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
530 VIDTCON2_HOZVAL(mode->hdisplay - 1) |
531 VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
532 VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
533 writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
534
535 fimd_setup_trigger(ctx);
536
537 /*
538 * fields of register with prefix '_F' would be updated
539 * at vsync(same as dma start)
540 */
541 val = ctx->vidcon0;
542 val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
543
544 if (ctx->driver_data->has_clksel)
545 val |= VIDCON0_CLKSEL_LCD;
546
547 if (ctx->clkdiv > 1)
548 val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR;
549
550 writel(val, ctx->regs + VIDCON0);
551 }
552
553
554 static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
555 uint32_t pixel_format, int width)
556 {
557 unsigned long val;
558
559 val = WINCONx_ENWIN;
560
561 /*
562 * In case of s3c64xx, window 0 doesn't support alpha channel.
563 * So the request format is ARGB8888 then change it to XRGB8888.
564 */
565 if (ctx->driver_data->has_limited_fmt && !win) {
566 if (pixel_format == DRM_FORMAT_ARGB8888)
567 pixel_format = DRM_FORMAT_XRGB8888;
568 }
569
570 switch (pixel_format) {
571 case DRM_FORMAT_C8:
572 val |= WINCON0_BPPMODE_8BPP_PALETTE;
573 val |= WINCONx_BURSTLEN_8WORD;
574 val |= WINCONx_BYTSWP;
575 break;
576 case DRM_FORMAT_XRGB1555:
577 val |= WINCON0_BPPMODE_16BPP_1555;
578 val |= WINCONx_HAWSWP;
579 val |= WINCONx_BURSTLEN_16WORD;
580 break;
581 case DRM_FORMAT_RGB565:
582 val |= WINCON0_BPPMODE_16BPP_565;
583 val |= WINCONx_HAWSWP;
584 val |= WINCONx_BURSTLEN_16WORD;
585 break;
586 case DRM_FORMAT_XRGB8888:
587 val |= WINCON0_BPPMODE_24BPP_888;
588 val |= WINCONx_WSWP;
589 val |= WINCONx_BURSTLEN_16WORD;
590 break;
591 case DRM_FORMAT_ARGB8888:
592 val |= WINCON1_BPPMODE_25BPP_A1888
593 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
594 val |= WINCONx_WSWP;
595 val |= WINCONx_BURSTLEN_16WORD;
596 break;
597 default:
598 DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
599
600 val |= WINCON0_BPPMODE_24BPP_888;
601 val |= WINCONx_WSWP;
602 val |= WINCONx_BURSTLEN_16WORD;
603 break;
604 }
605
606 /*
607 * Setting dma-burst to 16Word causes permanent tearing for very small
608 * buffers, e.g. cursor buffer. Burst Mode switching which based on
609 * plane size is not recommended as plane size varies alot towards the
610 * end of the screen and rapid movement causes unstable DMA, but it is
611 * still better to change dma-burst than displaying garbage.
612 */
613
614 if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
615 val &= ~WINCONx_BURSTLEN_MASK;
616 val |= WINCONx_BURSTLEN_4WORD;
617 }
618
619 writel(val, ctx->regs + WINCON(win));
620
621 /* hardware window 0 doesn't support alpha channel. */
622 if (win != 0) {
623 /* OSD alpha */
624 val = VIDISD14C_ALPHA0_R(0xf) |
625 VIDISD14C_ALPHA0_G(0xf) |
626 VIDISD14C_ALPHA0_B(0xf) |
627 VIDISD14C_ALPHA1_R(0xf) |
628 VIDISD14C_ALPHA1_G(0xf) |
629 VIDISD14C_ALPHA1_B(0xf);
630
631 writel(val, ctx->regs + VIDOSD_C(win));
632
633 val = VIDW_ALPHA_R(0xf) | VIDW_ALPHA_G(0xf) |
634 VIDW_ALPHA_G(0xf);
635 writel(val, ctx->regs + VIDWnALPHA0(win));
636 writel(val, ctx->regs + VIDWnALPHA1(win));
637 }
638 }
639
640 static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
641 {
642 unsigned int keycon0 = 0, keycon1 = 0;
643
644 keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
645 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
646
647 keycon1 = WxKEYCON1_COLVAL(0xffffffff);
648
649 writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
650 writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
651 }
652
653 /**
654 * shadow_protect_win() - disable updating values from shadow registers at vsync
655 *
656 * @win: window to protect registers for
657 * @protect: 1 to protect (disable updates)
658 */
659 static void fimd_shadow_protect_win(struct fimd_context *ctx,
660 unsigned int win, bool protect)
661 {
662 u32 reg, bits, val;
663
664 /*
665 * SHADOWCON/PRTCON register is used for enabling timing.
666 *
667 * for example, once only width value of a register is set,
668 * if the dma is started then fimd hardware could malfunction so
669 * with protect window setting, the register fields with prefix '_F'
670 * wouldn't be updated at vsync also but updated once unprotect window
671 * is set.
672 */
673
674 if (ctx->driver_data->has_shadowcon) {
675 reg = SHADOWCON;
676 bits = SHADOWCON_WINx_PROTECT(win);
677 } else {
678 reg = PRTCON;
679 bits = PRTCON_PROTECT;
680 }
681
682 val = readl(ctx->regs + reg);
683 if (protect)
684 val |= bits;
685 else
686 val &= ~bits;
687 writel(val, ctx->regs + reg);
688 }
689
690 static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
691 {
692 struct fimd_context *ctx = crtc->ctx;
693 int i;
694
695 if (ctx->suspended)
696 return;
697
698 for (i = 0; i < WINDOWS_NR; i++)
699 fimd_shadow_protect_win(ctx, i, true);
700 }
701
702 static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
703 {
704 struct fimd_context *ctx = crtc->ctx;
705 int i;
706
707 if (ctx->suspended)
708 return;
709
710 for (i = 0; i < WINDOWS_NR; i++)
711 fimd_shadow_protect_win(ctx, i, false);
712
713 exynos_crtc_handle_event(crtc);
714 }
715
716 static void fimd_update_plane(struct exynos_drm_crtc *crtc,
717 struct exynos_drm_plane *plane)
718 {
719 struct exynos_drm_plane_state *state =
720 to_exynos_plane_state(plane->base.state);
721 struct fimd_context *ctx = crtc->ctx;
722 struct drm_framebuffer *fb = state->base.fb;
723 dma_addr_t dma_addr;
724 unsigned long val, size, offset;
725 unsigned int last_x, last_y, buf_offsize, line_size;
726 unsigned int win = plane->index;
727 unsigned int bpp = fb->format->cpp[0];
728 unsigned int pitch = fb->pitches[0];
729
730 if (ctx->suspended)
731 return;
732
733 offset = state->src.x * bpp;
734 offset += state->src.y * pitch;
735
736 /* buffer start address */
737 dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
738 val = (unsigned long)dma_addr;
739 writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
740
741 /* buffer end address */
742 size = pitch * state->crtc.h;
743 val = (unsigned long)(dma_addr + size);
744 writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
745
746 DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
747 (unsigned long)dma_addr, val, size);
748 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
749 state->crtc.w, state->crtc.h);
750
751 /* buffer size */
752 buf_offsize = pitch - (state->crtc.w * bpp);
753 line_size = state->crtc.w * bpp;
754 val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
755 VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
756 VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
757 VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
758 writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
759
760 /* OSD position */
761 val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
762 VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
763 VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
764 VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
765 writel(val, ctx->regs + VIDOSD_A(win));
766
767 last_x = state->crtc.x + state->crtc.w;
768 if (last_x)
769 last_x--;
770 last_y = state->crtc.y + state->crtc.h;
771 if (last_y)
772 last_y--;
773
774 val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
775 VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
776
777 writel(val, ctx->regs + VIDOSD_B(win));
778
779 DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
780 state->crtc.x, state->crtc.y, last_x, last_y);
781
782 /* OSD size */
783 if (win != 3 && win != 4) {
784 u32 offset = VIDOSD_D(win);
785 if (win == 0)
786 offset = VIDOSD_C(win);
787 val = state->crtc.w * state->crtc.h;
788 writel(val, ctx->regs + offset);
789
790 DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
791 }
792
793 fimd_win_set_pixfmt(ctx, win, fb->format->format, state->src.w);
794
795 /* hardware window 0 doesn't support color key. */
796 if (win != 0)
797 fimd_win_set_colkey(ctx, win);
798
799 fimd_enable_video_output(ctx, win, true);
800
801 if (ctx->driver_data->has_shadowcon)
802 fimd_enable_shadow_channel_path(ctx, win, true);
803
804 if (ctx->i80_if)
805 atomic_set(&ctx->win_updated, 1);
806 }
807
808 static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
809 struct exynos_drm_plane *plane)
810 {
811 struct fimd_context *ctx = crtc->ctx;
812 unsigned int win = plane->index;
813
814 if (ctx->suspended)
815 return;
816
817 fimd_enable_video_output(ctx, win, false);
818
819 if (ctx->driver_data->has_shadowcon)
820 fimd_enable_shadow_channel_path(ctx, win, false);
821 }
822
823 static void fimd_enable(struct exynos_drm_crtc *crtc)
824 {
825 struct fimd_context *ctx = crtc->ctx;
826
827 if (!ctx->suspended)
828 return;
829
830 ctx->suspended = false;
831
832 pm_runtime_get_sync(ctx->dev);
833
834 /* if vblank was enabled status, enable it again. */
835 if (test_and_clear_bit(0, &ctx->irq_flags))
836 fimd_enable_vblank(ctx->crtc);
837
838 fimd_commit(ctx->crtc);
839 }
840
841 static void fimd_disable(struct exynos_drm_crtc *crtc)
842 {
843 struct fimd_context *ctx = crtc->ctx;
844 int i;
845
846 if (ctx->suspended)
847 return;
848
849 /*
850 * We need to make sure that all windows are disabled before we
851 * suspend that connector. Otherwise we might try to scan from
852 * a destroyed buffer later.
853 */
854 for (i = 0; i < WINDOWS_NR; i++)
855 fimd_disable_plane(crtc, &ctx->planes[i]);
856
857 fimd_enable_vblank(crtc);
858 fimd_wait_for_vblank(crtc);
859 fimd_disable_vblank(crtc);
860
861 writel(0, ctx->regs + VIDCON0);
862
863 pm_runtime_put_sync(ctx->dev);
864 ctx->suspended = true;
865 }
866
867 static void fimd_trigger(struct device *dev)
868 {
869 struct fimd_context *ctx = dev_get_drvdata(dev);
870 const struct fimd_driver_data *driver_data = ctx->driver_data;
871 void *timing_base = ctx->regs + driver_data->timing_base;
872 u32 reg;
873
874 /*
875 * Skips triggering if in triggering state, because multiple triggering
876 * requests can cause panel reset.
877 */
878 if (atomic_read(&ctx->triggering))
879 return;
880
881 /* Enters triggering mode */
882 atomic_set(&ctx->triggering, 1);
883
884 reg = readl(timing_base + TRIGCON);
885 reg |= (TRGMODE_ENABLE | SWTRGCMD_ENABLE);
886 writel(reg, timing_base + TRIGCON);
887
888 /*
889 * Exits triggering mode if vblank is not enabled yet, because when the
890 * VIDINTCON0 register is not set, it can not exit from triggering mode.
891 */
892 if (!test_bit(0, &ctx->irq_flags))
893 atomic_set(&ctx->triggering, 0);
894 }
895
896 static void fimd_te_handler(struct exynos_drm_crtc *crtc)
897 {
898 struct fimd_context *ctx = crtc->ctx;
899 u32 trg_type = ctx->driver_data->trg_type;
900
901 /* Checks the crtc is detached already from encoder */
902 if (ctx->pipe < 0 || !ctx->drm_dev)
903 return;
904
905 if (trg_type == I80_HW_TRG)
906 goto out;
907
908 /*
909 * If there is a page flip request, triggers and handles the page flip
910 * event so that current fb can be updated into panel GRAM.
911 */
912 if (atomic_add_unless(&ctx->win_updated, -1, 0))
913 fimd_trigger(ctx->dev);
914
915 out:
916 /* Wakes up vsync event queue */
917 if (atomic_read(&ctx->wait_vsync_event)) {
918 atomic_set(&ctx->wait_vsync_event, 0);
919 wake_up(&ctx->wait_vsync_queue);
920 }
921
922 if (test_bit(0, &ctx->irq_flags))
923 drm_crtc_handle_vblank(&ctx->crtc->base);
924 }
925
926 static void fimd_dp_clock_enable(struct exynos_drm_clk *clk, bool enable)
927 {
928 struct fimd_context *ctx = container_of(clk, struct fimd_context,
929 dp_clk);
930 u32 val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
931 writel(val, ctx->regs + DP_MIE_CLKCON);
932 }
933
934 static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
935 .enable = fimd_enable,
936 .disable = fimd_disable,
937 .commit = fimd_commit,
938 .enable_vblank = fimd_enable_vblank,
939 .disable_vblank = fimd_disable_vblank,
940 .atomic_begin = fimd_atomic_begin,
941 .update_plane = fimd_update_plane,
942 .disable_plane = fimd_disable_plane,
943 .atomic_flush = fimd_atomic_flush,
944 .atomic_check = fimd_atomic_check,
945 .te_handler = fimd_te_handler,
946 };
947
948 static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
949 {
950 struct fimd_context *ctx = (struct fimd_context *)dev_id;
951 u32 val, clear_bit;
952
953 val = readl(ctx->regs + VIDINTCON1);
954
955 clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
956 if (val & clear_bit)
957 writel(clear_bit, ctx->regs + VIDINTCON1);
958
959 /* check the crtc is detached already from encoder */
960 if (ctx->pipe < 0 || !ctx->drm_dev)
961 goto out;
962
963 if (!ctx->i80_if)
964 drm_crtc_handle_vblank(&ctx->crtc->base);
965
966 if (ctx->i80_if) {
967 /* Exits triggering mode */
968 atomic_set(&ctx->triggering, 0);
969 } else {
970 /* set wait vsync event to zero and wake up queue. */
971 if (atomic_read(&ctx->wait_vsync_event)) {
972 atomic_set(&ctx->wait_vsync_event, 0);
973 wake_up(&ctx->wait_vsync_queue);
974 }
975 }
976
977 out:
978 return IRQ_HANDLED;
979 }
980
981 static int fimd_bind(struct device *dev, struct device *master, void *data)
982 {
983 struct fimd_context *ctx = dev_get_drvdata(dev);
984 struct drm_device *drm_dev = data;
985 struct exynos_drm_private *priv = drm_dev->dev_private;
986 struct exynos_drm_plane *exynos_plane;
987 unsigned int i;
988 int ret;
989
990 ctx->drm_dev = drm_dev;
991 ctx->pipe = priv->pipe++;
992
993 for (i = 0; i < WINDOWS_NR; i++) {
994 ctx->configs[i].pixel_formats = fimd_formats;
995 ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
996 ctx->configs[i].zpos = i;
997 ctx->configs[i].type = fimd_win_types[i];
998 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
999 1 << ctx->pipe, &ctx->configs[i]);
1000 if (ret)
1001 return ret;
1002 }
1003
1004 exynos_plane = &ctx->planes[DEFAULT_WIN];
1005 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
1006 ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
1007 &fimd_crtc_ops, ctx);
1008 if (IS_ERR(ctx->crtc))
1009 return PTR_ERR(ctx->crtc);
1010
1011 if (ctx->driver_data->has_dp_clk) {
1012 ctx->dp_clk.enable = fimd_dp_clock_enable;
1013 ctx->crtc->pipe_clk = &ctx->dp_clk;
1014 }
1015
1016 if (ctx->encoder)
1017 exynos_dpi_bind(drm_dev, ctx->encoder);
1018
1019 if (is_drm_iommu_supported(drm_dev))
1020 fimd_clear_channels(ctx->crtc);
1021
1022 ret = drm_iommu_attach_device(drm_dev, dev);
1023 if (ret)
1024 priv->pipe--;
1025
1026 return ret;
1027 }
1028
1029 static void fimd_unbind(struct device *dev, struct device *master,
1030 void *data)
1031 {
1032 struct fimd_context *ctx = dev_get_drvdata(dev);
1033
1034 fimd_disable(ctx->crtc);
1035
1036 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
1037
1038 if (ctx->encoder)
1039 exynos_dpi_remove(ctx->encoder);
1040 }
1041
1042 static const struct component_ops fimd_component_ops = {
1043 .bind = fimd_bind,
1044 .unbind = fimd_unbind,
1045 };
1046
1047 static int fimd_probe(struct platform_device *pdev)
1048 {
1049 struct device *dev = &pdev->dev;
1050 struct fimd_context *ctx;
1051 struct device_node *i80_if_timings;
1052 struct resource *res;
1053 int ret;
1054
1055 if (!dev->of_node)
1056 return -ENODEV;
1057
1058 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1059 if (!ctx)
1060 return -ENOMEM;
1061
1062 ctx->dev = dev;
1063 ctx->suspended = true;
1064 ctx->driver_data = of_device_get_match_data(dev);
1065
1066 if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1067 ctx->vidcon1 |= VIDCON1_INV_VDEN;
1068 if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1069 ctx->vidcon1 |= VIDCON1_INV_VCLK;
1070
1071 i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1072 if (i80_if_timings) {
1073 u32 val;
1074
1075 ctx->i80_if = true;
1076
1077 if (ctx->driver_data->has_vidoutcon)
1078 ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1079 else
1080 ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1081 /*
1082 * The user manual describes that this "DSI_EN" bit is required
1083 * to enable I80 24-bit data interface.
1084 */
1085 ctx->vidcon0 |= VIDCON0_DSI_EN;
1086
1087 if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1088 val = 0;
1089 ctx->i80ifcon = LCD_CS_SETUP(val);
1090 if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1091 val = 0;
1092 ctx->i80ifcon |= LCD_WR_SETUP(val);
1093 if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1094 val = 1;
1095 ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1096 if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1097 val = 0;
1098 ctx->i80ifcon |= LCD_WR_HOLD(val);
1099 }
1100 of_node_put(i80_if_timings);
1101
1102 ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1103 "samsung,sysreg");
1104 if (IS_ERR(ctx->sysreg)) {
1105 dev_warn(dev, "failed to get system register.\n");
1106 ctx->sysreg = NULL;
1107 }
1108
1109 ctx->bus_clk = devm_clk_get(dev, "fimd");
1110 if (IS_ERR(ctx->bus_clk)) {
1111 dev_err(dev, "failed to get bus clock\n");
1112 return PTR_ERR(ctx->bus_clk);
1113 }
1114
1115 ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1116 if (IS_ERR(ctx->lcd_clk)) {
1117 dev_err(dev, "failed to get lcd clock\n");
1118 return PTR_ERR(ctx->lcd_clk);
1119 }
1120
1121 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1122
1123 ctx->regs = devm_ioremap_resource(dev, res);
1124 if (IS_ERR(ctx->regs))
1125 return PTR_ERR(ctx->regs);
1126
1127 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1128 ctx->i80_if ? "lcd_sys" : "vsync");
1129 if (!res) {
1130 dev_err(dev, "irq request failed.\n");
1131 return -ENXIO;
1132 }
1133
1134 ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1135 0, "drm_fimd", ctx);
1136 if (ret) {
1137 dev_err(dev, "irq request failed.\n");
1138 return ret;
1139 }
1140
1141 init_waitqueue_head(&ctx->wait_vsync_queue);
1142 atomic_set(&ctx->wait_vsync_event, 0);
1143
1144 platform_set_drvdata(pdev, ctx);
1145
1146 ctx->encoder = exynos_dpi_probe(dev);
1147 if (IS_ERR(ctx->encoder))
1148 return PTR_ERR(ctx->encoder);
1149
1150 pm_runtime_enable(dev);
1151
1152 ret = component_add(dev, &fimd_component_ops);
1153 if (ret)
1154 goto err_disable_pm_runtime;
1155
1156 return ret;
1157
1158 err_disable_pm_runtime:
1159 pm_runtime_disable(dev);
1160
1161 return ret;
1162 }
1163
1164 static int fimd_remove(struct platform_device *pdev)
1165 {
1166 pm_runtime_disable(&pdev->dev);
1167
1168 component_del(&pdev->dev, &fimd_component_ops);
1169
1170 return 0;
1171 }
1172
1173 #ifdef CONFIG_PM
1174 static int exynos_fimd_suspend(struct device *dev)
1175 {
1176 struct fimd_context *ctx = dev_get_drvdata(dev);
1177
1178 clk_disable_unprepare(ctx->lcd_clk);
1179 clk_disable_unprepare(ctx->bus_clk);
1180
1181 return 0;
1182 }
1183
1184 static int exynos_fimd_resume(struct device *dev)
1185 {
1186 struct fimd_context *ctx = dev_get_drvdata(dev);
1187 int ret;
1188
1189 ret = clk_prepare_enable(ctx->bus_clk);
1190 if (ret < 0) {
1191 DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
1192 return ret;
1193 }
1194
1195 ret = clk_prepare_enable(ctx->lcd_clk);
1196 if (ret < 0) {
1197 DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
1198 return ret;
1199 }
1200
1201 return 0;
1202 }
1203 #endif
1204
1205 static const struct dev_pm_ops exynos_fimd_pm_ops = {
1206 SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1207 };
1208
1209 struct platform_driver fimd_driver = {
1210 .probe = fimd_probe,
1211 .remove = fimd_remove,
1212 .driver = {
1213 .name = "exynos4-fb",
1214 .owner = THIS_MODULE,
1215 .pm = &exynos_fimd_pm_ops,
1216 .of_match_table = fimd_driver_dt_match,
1217 },
1218 };
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